Improvement in seals for dip-fires in gas-works



Inl/enfer Wilncsss MH www@ ILPETERS, PHOTO-DTHOGRAPHER, WASHINGTON. D.C4

UNITED STATES PATENT CEETOE.

GRAFTON DOUTY, OF COLUMBUS, OHIO.

IMPROVEMENT IN SEALS FOR D|PP|P.ES IN GAS-WORKS..

Specification forming part of Letters Patent No. 111,439, dated January31, 1871.

To all whom it may concern:

Be it known that I, GRAFTON DOUTY, of Columbus, in the county ofFranklin and State of Ohio, have invented a new and useful Improvementin Hydraulic Seals for Apparatus for Manufacturing Illuminating-Gas, ofwhich the following is a specification:

The object of my invention is to provide a means for sealin g andunsealin g the dip-pipes in hydraulic mains of gas-works, for thepurpose of relieving the back-pressure in the retorts in charging andwithdrawing the charge therefrom, and thereby prevent the formation ofcarbon in said retort.

The accompanying drawing represents a vertical cross-section of thehydraulic main, showing one of the dip-pipes unsealed and its connectionwith the retort and the main, and in which- A indicates a portion of theretort, which is connected to the hydraulic main B by the usualstand-pipe C and bridge D.

Instead of connecting the bridge D directly to the dip-pipe E, asheretofore, it is joined to and communicates with a chamber, F, securedto the hydralic main, and which receives and entirely incloses thedip-pipe E, so as to allow it to rise and fall therein, to seal andunseal the main.

Another distinguishing feature of my invention consists in constructingthe upper part ofthe dip-pipe with an enlarged end, G, which, inconnection with a corresponding construction of the inclosing-chamber F,serves two useful and important functions: first, to form a ground-seat,H, to limit the descent of the dip pipe, and, second, a sealing -jointbetween the dip-pipe and the main, when the communication of the latterwith the retort is cut oif.

The lower portion, I, of the inclosing-chamber F forms a guide andbearing for the lower portion, E, of the dip-pipe, while the upperportion of said chamber is enlarged in diameter, and constitutes a guideto the upper portion of the dip-pipe, and between these two portions ofthe inclosing-chamber the supporting and sealing seat H and Hl isarranged.

This ground-seat H Hl may be of any desired construction, but I preferto make the ground-surfaces of the dip-pipe and the chamber which formthe seat oblique, as shown in the drawing.

This seat H has the additional advantage of forming a lodgment for anygum and fatty matter which may rise in the inolosing-chamber F, and thusassist in producing a tight joint when the dip-pipe is sealed, so thatit is not necessary that the bearing-surfaces of the dip-pipe andinclosing-chamber should lit accurately, thus obtainingthe advantage ofbeing enabled to raise and lower the dip-pipe without binding Within itschamber.

For convenience, the chamber is constructed in two sections, F and I,with the supporting and sealing seat H formed in the lower section, andby the use of this chamber I am enabled to employ a movable dip-pipe,which may be raised and lowered, to seal and unseal the main. Both endsof this dip-pipe are open, and it is connected by a bail, J, and jointedstem K to a weighted lever, L, pivoted to an arm, M, rising from thebridge D, and having a connecting-rod, N, which, when connected with ahook, a, on the stand-pipe C, elevates and unseals the dip-pipe, andwhen released from said hook the weight P, together with that of thedip-pipe, forces down said pipe and seals the main.

The weighted lever L may be connected to the standard M, or to the stemK of the dippipe, by links b, so as to allow the stem to pass throughthe stufling-box R, at the upper end 0f the inclosing-chainber F,Without binding.

The level of the tar or water in the hydraulic main must always besufficient to seal the dippipes when down, as represented in thedrawlng.

l do not claim, broadly, sealing and unsealin g gas-retorts, to preventthe formation of carbon therein, as that has already been patented toGeorge A. Mcllhenny, June 18, 1867.

Having described my invention, I claim-- l. Achamber, F, for a movabledip-pipe, E G, interposed between the hydraulic main B and retort, andcommunicating therewith through the dip-pipe, to seal and unseal themain, as described.

2. The supporting and sealing seat H H of the movable dip-pipe E G, asdescribed.

3. The arrangement of the weighted lever constructed, arranged, andoperating as de- L, connecting-rod N, and movable dip-pipe E scribed.Gr, for the purpose of raising and locking the In testimony whereofIhavehereunto signed dip-pipe when unsealed and forcing it down my name.upon its seat when sealed, as described.

4. In combination with ahydraulic seal and GRAFTON DOUT' gas-retort, themovable dip-pipe E G. the in- Witnesses: closing-chamber F, thecommunicating-bridge W. H. MILLER,

D, and the raising and depressing lever L, l E. L. DEVVITT.

